While server is running, open another prompt window (a "cmd" window in Windows) and this time type:
netpanzer -b [server IP]:[server port]
Where server IP is likely to be your local PC address (or 127.0.0.1) and port is 3030 if you did not change.
netpanzer -b 127.0.0.1:3030
If you want more bots, just open more prompt windows and repeat command.
OK, now you're ready for space travel :-)